Chemistry: physical processes – Physical processes – Crystallization
Reexamination Certificate
2011-01-25
2011-01-25
Johnson, Edward M (Department: 1736)
Chemistry: physical processes
Physical processes
Crystallization
C023S296000
Reexamination Certificate
active
07875086
ABSTRACT:
The present invention is a method for simultaneously separating two highly pure fullerenes from a mixture of fullerenes via crystallization, by (i) adjusting the amount of solvent in the mixture fed to a first crystallizer to obtain a phase equilibrium behavior so a first fullerene component of the two fullerenes, in the form of pure crystal, solid solution crystal, or solvate crystal is obtained; (ii) adjusting the amount of solvent in another mixture fed to a second crystallizer, operating at a temperature different from the first crystallizer, to obtain a phase equilibrium behavior so a second fullerene component of the two fullerenes, in the form of pure crystal, solid solution crystal, or solvate crystal is obtained; and additionally (iii) purifying the solid solution or the solvate into highly pure fullerene, when the solid product from the crystallizers is in the form of solid solution or solvate.
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Harkins Tanya E.
Johnson Edward M
Meyer Jerald L.
The Hong Kong University of Science and Technology
The Nath Law Group
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